| 摘要 |
2095147 9207850 PCTABS00013 A compound of formula (I) or a tautomeric form thereof and/or a pharmaceutically acceptable salt thereof, and/or a pharmaceutically acceptable solvate thereof, wherein: A1 represents an alkyl group, a substituted or unsubstituted aryl group, an aralkyl group wherein the alkylene or the aryl moiety may be substituted or unsubstituted or a substituted or unsubstituted aromatic heterocyclic group; A2 represents a benzene ring having in total up to three optional substituents; R1 represents a hydrogen atom, an alkyl group, an aralkyl group wherein the alkyl or the aryl moiety may be substituted or unsubstituted, or a substituted or unsubstituted aryl group; or A1 together with R1 represents substituted or unsubstituted C3-4 polymethylene group, optional substituents for the polymethylene group being selected from alkyl or aryl or adjacent substituents together with the methylene carbon atoms to which they are attached form a substituted or unsubstituted phenylene group; R2 and R3 each represent hydrogen, or R2 and R3 together represent a bond; X represents O or S; and n represents an integer in the range of from 2 to 6; a process for preparing such a compound, a composition comprising such a compound and the use of such a compound and composition in medicine.
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